The tree record now extends back about 10,000 years in the past. They have detected some serious worldwide events in our past.
I was expresssing a bit of sarcasm and forget to my /sarc label at the end
OF COURSE extreme weather changes have occurred, naturally, in the past
humans do not usually stop and realize that in terms of “earth history” their personal experience is infintessimally small and all of human history not a great deal greater